Engine-governor.



P TBNTED'MAYM, 1904. I, J. W. SARGENT. I

ENGINE GOVERNOR. v PPLIQATION FILED JUNE 30.1902.

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, PATENTED MAY 24, 1904. J. W. SARGENT. ENGINE GOVERNOR.

APPLICATION FILED JUNE 30,1902.

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UNITED STATES Patented May 24, 1904.

PATENT OF ICE.

JOHN W. SARGENT, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO PROVIDENCE ENGINEERING v WORKS, PROVIDENCE, RHODE ISLAND.

ENGINE-GOVERNOR} SPECIFICATION forming part of LettersPatent No. 760,808, dated May 24, 1904.

Application filed June 30, 1902.

To all whom it'may concern.-

Be it known that'I, JOHN W. SARGENT, a citizen of the United States, residing at Providence, in the State of Rhode Island, have invented a new and useful Improvement in Engine-Governors, of which the following is a specification.

' -My invention relates to governors of that means of a pair of angularly-arranged links having a swivel-joint at the angular junction of the links and forming a parallelmotion on the axial line of the governor,

It also consists in spring means arranged for action through the axial center of revolution and operating to draw the governinglevers toward each other and to yieldingly resist their centrifugal tendency.

It also consists in certain ,details of construction, as hereinafter set forth.

In the drawings, Figure 1 represents a face view of an inertia and centrifugal governor embodying my invention. 'Fig. 2 represents a section taken in the line 2 2 of Fig. 1, the

rock-shaft from which connection is to be made with the valve-gear being shown in elevation. Fig. 3 represents a face view with the rock-shaft and the swivel-link connection with the governing-levers removed. Fig. 4. represents a detail view showing the swiveljoint and the links, by means of which connection is made between the governing-levers and the rock-shaft, the end of the crank-arm of the rock-shaft being shown in section.

Figs. 5 and 6 show a modification in the form of the radial spring connection which extends across the center of revolution between the .governingdevers.

As shown in the drawings, the governor is Serial No. 113,761. (No model.)

mounted upon a shaft A, which'has a bearing B in the projecting hub of the stationary holding-case C, which latter is to be bolted to the frame of the engine at the flattened base D of the case, the said shaft A being driven by means of the pulley E, keyed to the outer end of the-shaft, 'and to the inner end of the said shaft within the case C is keyed the double crank-arm F, upon the opposite crank-pins H H of which the governing-levers G G are pivoted, the said governing-levers being preferably made in the form of an eccentric wheel and arranged side by side upon the said crankpins, which project from the side of the double crank-arm F at equal distances from the axis of the shaft A. The arms a a of the governinglevers G G are preferably weighted at I) 6, and the, said governing-levers are connected'with each other to form a mechanical couple by means of the link I, which extends from one to the other in a-plane which is parallel with a plane running through the axes of the crankpins H H and'having the distance between the pivot-pins c e of the link I equal to the distance between the axes of the crank-pins H H, thus forming,.with the governing-levers, a parallel movement. From the projecting lug d upon one of the governing-levers to the opposite projecting lug upon the other governing-lever connection is made by means of the coil-spring J, which passes from side to side diametrically across the axis of revolution in the governor, so that in the revolution of the governor the centrifugal force exerted upon the coils of the spring at opposite sides of the center of revolution will be equal.

.In the fixed bearings K K, bolted to the case C, is held the rock-shaft L, from the one end of which the usual connection is to be governing-levers G G by means of the links P P, which latter are connected with the said governing-levers by means of the universal joints Q, Q, consisting of the pivot-pins e 0, arranged at equal distances from the crankpin H H and equidistant from the center of the governor and the swivel-blocks f f, to which the links P P are pivoted by means of the pins g g, whereby uponthe movement of the governing-levers G G in either direction a corresponding turning movement will be imparted to the rock-shaft L, from which operative connection is to be made with the valve-gear.

One of the governing-levers G is provided with the pin it, upon which is preferably placed the buffer-ring i, made of a yielding material, like rubber or leather, and the opposite governing-lever G is provided with the stop-pieces j j, which are adapted to engage with the buffer-ring 2' at the opposite extremes of the movement of the governing-levers.

A modification in the spring connection of the governing-levers is shown in Figs. 5 and 6, in which the springs J J, which at their outer ends are jointed to the lugs d d of the governing levers, are at their inner ends hooked around an extension is of the shaft A, the said springs being arranged to act under equal pressure radially across the center of revolution of the governor. By arranging the spring J or the. springs J J across the center of revolution the centrifugal tendency of the coils of the spring will be equalized between the governing-levers, thus producing uniformity of action in the governor and also avoiding the disturbing side strain upon the spring which results from its own centrifugal tendency when the spring is arranged eccentrically of the governor, the spring always crossing the line of the axis of the governorshaft whatever may be the position of the governing-levers.

I claim as my invention- 1. In an engine-governor, the combination of the shaft, the double crank-arm held upon the shaft, the opposite crank-pins arranged at equal distances from the axis of the shaft, the governing-levers pivoted on the crankpins, means for linking the governing-levers together to form a mechanical couple, and the spring connection between the governinglevers, with the rock-shaft connected with the valve-gear, the crank-arm upon the rock-shaft, the swivel-joint at the end of the crank-arm, the universal joints located upon the governing-leversequidistant fromthepivoting-points of said levers, and from the axis of revolution, and the equal links which connect the universal joints with the swivel-joint of the rock-shaft arm, substantially as described.

2. In an engine-governor, the combination of the rock-shaft, the governor-shaft, the double crank-arm held upon the governorshaft, the opposite crank-pins arranged at equal distances from axis of the governorshaft, the governing-levers pivoted on the crank-pins, means for linking the governinglevers together to form a mechanical couple, and means connected with the governing-levers for operating the rock-shaft, with the stop projection on one of the governing-levers, and the intermediate stop projection on the opposite governing-lever, whereby the movement of the governing-levers relatively to each other will be limited, substantially as described.

JOHN W. SARGEN'I. Witnesses:

SooRA'rEs SCHOLFIELD, FRANK D. J ENKS. 

